| Question 1: Who first explained electromagnetic waves mathematically ? | Maxwell |
| Question 2: Which factor of the following does not affect resistance of a conducting wire ? | Voltage applied |
| Question 3: When a dielectric is placed in an external electric field, the effective electric field inside the dielectric | decreases |
| Question 4: A capacitor of capacitance 1 µF is kept at 1V potential difference between the plates. The charge on the charged capacitor will be | 1µC |
| Question 5: If a charged particle of mass m and charge q enters a uniform magnetic field B.... | mvSinθ/qB |
| Question 6: An ideal ammeter has | zero resistance |
| Question 7: Remote controller in TV uses... | infrared waves |
| Question 8: The equivalent resistance of resistors in parallel combination | decreases |
| Question 9: The magnetic field lines inside a current-carrying solenoid are | parallel and straight |
| Question 10: Coherent sources are those sources for which | both phase difference and frequency remain constant |
| Question 11: Natural light from the sun is | unpolarised |
| Question 12: Radioactivity was discovered by | Henri Becquerel |
| Question 13: The example of a broadcast mode of communication is | Both A and C |
| Question 14: Which device is used as a voltage regulator ? | Zener Diode |
| Question 15: world wide web was invented by... | Tim Barner-Lee |
| Question 16: Electrical energy representation | V.I.t |
| Question 17: When an alpha-particle is brought towards another alpha-particle, the potential energy of the system | increased |
| Question 18: Dielectric constant of water is... | 80 |
| Question 19: The relationship between current density J and electric field intensity E is | Option D |
| Question 20: The yellow colour code value of carbon resistance is | 4 |
| Question 21: Relative permeability is equal to | Option B |
| Question 22: When an electric dipole p. is placed in a uniform electric field E.... | 90 |
| Question 23: A circular loop radius R carries a current I. Its magnetic dipole | Option D |
| Question 24: When the tube length of microscope is increased, its magnifying power | increases |
| Question 25: Cathode rays are the group of.... | electrons |
| Question 26: When a soap bubble is charged, then its size | increases |
| Question 27: If the area of plates of a capacitor is halved, then the capacitance will | become half |
| Question 28: Choke coil works on the principle of | transient current |
| Question 29: The dimensions of B/µ.... | energy density |
| Question 30: Nickel is.. | ferromagnetic |
| Question 31: In a half-wave rectifier, if the input frequency is 50 Hz, then output frequency will be | 50 Hz |
| Question 32: How many joules of energy will be released due to mass defect of 1 mg ? | Option C |
| Question 33: The ratio of de Broglie wavelength associated with two electrons accelerated through 49 V and 64 V is | 8/7 |
| Question 34: A ray of light is incident normally on a plane mirror... | 0 degree |
| Question 35: The phase difference φ is related to path difference by λ | Option B |
| Question 36: To remove hypermetropia, lens used is | convex |
| Question 37: Inverse square law of intensity of light, i.e., intensity.... | point source |
| Question 38: The kinetic energy ( K) of an electron in a Bohr orbit.... | K=-U/2 |
| Question 39: Semiconductor is damaged by the strong current due to.. | excess of electrons |
| Question 40: The valency of impurity element to convert a germanium crystal... | 3 |
| Question 41: In a communication system, a repeater is | a combination of a receiver and transmitter |
| Question 42: The maximum velocity of an electron emitted from a metal surface... | 2hv/3 |
| Question 43: If a bar magnet is cut into two equal pieces transverse to its length, then each piece will | behave as a new magnet with reduced magnetie moment |
| Question 44: In an ac circuit of capacitance the current from difference is | forward |
| Question 45: A capacitor is a perfect insulator for | direct currents |
| Question 46: The unit displacement of current is | A |
| Question 47: solar spectrum is... | continuous |
| Question 48: the field of view is maximum for... | convex mirror |
| Question 49: The ratio of the refractive index of red light to blue light in | less than unity |
| Question 50: The nuclear density is approximately | independent of mass number |
| Question 51: in a trasistor.. | concentration of impurities in the base is minimum |
| Question 52: Coulomb's law is valid for | Point charges only |
| Question 53: SI Unit of electric flux is... | Vm |
Question 54: A cell of internal resistance ris connected to an external resistance
R. The current will be maximum in R, if | R=r |
| Question 55: If L and R represent inductance and resistance respectively.... | second |
| Question 56: In a metallic conductor, the current is carried by | free electrons |
| Question 57: The surface charge densities on the surface of two... | 1:1 |
| Question 58: Ohm's law does not apply when... | temparature changes |
| Question 59: An example of natural electromagnetic induction is | lightning strike |
| Question 60: Which quantity decreases in step-down transformer ? | Voltage |
| Question 61: The refractive index of water is 1.33... | Option C |
| Question 62: The maximum kinetic energy of the photoelectrons varies | linearly with the frequency and is independent of the intensity of the incident radiation |
| Question 63: Which of the following are known as nucleons ? | protons and neutrons |
| Question 64: The momentum ( p) of photon is | Option A |
| Question 65: The radius of the lowest Bohr's orbit in hydrogen... | 4r0 |
| Question 66: If magnetic field is same but the area of the loop is increased, then the flux | increases |
| Question 67: The voltage of domestic ac is 220 V. What does this represent ? | Root mean square voltage |
| Question 68: The wavefront due to a point source at a finite distance from the source is | spherical |
| Question 69: For destructive interference, the path difference should be equal to | Option B |
| Question 70: In an electric field of intensity E = O, the potential V will vary with distance r. | Option D |
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