Physics - Online Test
Q1. The transverse nature of light is shown in,
Answer : Option D
Explaination / Solution:
No Explaination.
Q2. A thin conducting spherical
shell of radius R has a charge Q which is uniformly distributed on its surface.
The correct plot for electrostatic potential due to this spherical shell is
Answer : Option B
Explaination / Solution:
No Explaination.
Q3. The mean wavelength of light from sun is taken
to be 550 nm and its mean power is 3.8 × 1026W. The number of
photons received by the human eye per second on the average from sunlight is of
the order of
Answer : Option A
Explaination / Solution:
Q4. There is a current of 1.0 A
in the circuit shown below. What is the resistance of P ?
Answer : Option C
Explaination / Solution:
Q5. The nucleus is approximately spherical in shape. Then the surface area of nucleus having mass number A varies as
Answer : Option A
Explaination / Solution:
Surface
area = 4πR2
R=R0A1/3
Surface
area = 4π(R0A1/3)2
area
∝ A2/3
Q6. A non-conducting charged
ring of charge q, mass m and radius r is rotated with constant angular
speed ω. Find the ratio of its magnetic moment with angular momentum is
Answer : Option C
Explaination / Solution:
Q7. To obtain sustained oscillation in an oscillator,
Answer : Option D
Explaination / Solution:
No Explaination.
Q8. In a series RL circuit, the resistance and inductive reactance are the same. Then the phase difference between the voltage and current in the circuit is
Answer : Option A
Explaination / Solution:
Q9. The gravitational waves were theoretically proposed by
Answer : Option C
Explaination / Solution:
No Explaination.
Q10. A radiation of energy E falls normally on a perfectly reflecting surface. The momentum transferred to the surface is
Answer : Option B
Explaination / Solution:
