1.
A wave has speed 340 m/s and frequency 170 Hz. Its wavelength is:
2.
Lenz’s law is a consequence of:
3.
Which of the following has the highest binding energy per nucleon?
4.
Unit of electric flux is:
5.
In pair production, minimum photon energy required is:
6.
Which emission increases atomic number by 1?
7.
A parallel plate capacitor is charged and then disconnected. If plate separation is doubled, the potential difference:
8.
If a satellite's orbital radius is doubled, its time period becomes:
9.
A wire has resistance R. It is melted and recast to double length. New resistance?
10.
A ball dropped from a height H reaches ground in time t. From same height, if thrown up with speed u, time to reach ground is:
11.
Half-life of a substance is 5 minutes. What fraction remains after 20 minutes?
12.
Ratio of distances for equal time in projectile's upward and downward journey (with air resistance):
13.
When a magnet is cut into two pieces:
14.
Energy equivalent of 1 atomic mass unit (u) is:
15.
What happens to wavelength when light enters denser medium?
16.
A bullet hits and embeds in a block. Which quantity is conserved?
17.
A body dropped from height H hits ground in time t. If thrown upward with same speed, time taken is:
18.
A photon of energy 5 eV ejects an electron of 2 eV KE. What is work function?
19.
Coefficient of restitution is 1 in:
20.
If light passes from medium A (μ = 2) to medium B (μ = 1.5), it bends:
21.
Which radiation has highest penetrating power?
22.
Two identical capacitors are connected in parallel. Their equivalent capacitance is:
23.
If K.E. of photoelectron is zero, then frequency of incident light is:
24.
A mass attached to a spring executes SHM. At mean position, acceleration is:
25.
The focal length of a convex lens is 20 cm. Its power is:
26.
The potential energy of a spring-mass system in SHM is maximum when:
27.
A radioactive sample has decay constant λ. Its half-life is:
28.
A radioactive substance decays to 1/32nd in 5 hours. What is its half-life?
29.
A current flows through a straight wire. The magnetic field at a point near it is:
30.
The charge-to-mass ratio (e/m) of an electron was measured by:
31.
A Carnot engine has efficiency 50%. If the sink is at 300 K, source temperature is:
32.
If two resistors R1 and R2 are connected in parallel, equivalent resistance is:
33.
If a force acts perpendicular to velocity, it:
34.
Which is not a vector quantity?
35.
Threshold frequency for a metal is 5 × 10¹⁴ Hz. What is its work function? (h = 6.63×10⁻³⁴ J·s)
36.
If a particle is under only conservative forces, total mechanical energy is:
37.
Work done in compressing a gas adiabatically is:
38.
In nuclear fission, mass is converted to:
39.
Which color deviates most in a prism?
40.
The number of α and β particles emitted when ²³⁸U decays to ²⁰⁶Pb:
41.
Dimensional formula of magnetic flux is:
42.
Which process releases the most energy per nucleon?
43.
Photoelectric effect shows that light:
44.
Stopping potential in photoelectric effect is independent of:
45.
A ray of light returns back into the same medium after two refractions through a glass slab. Lateral shift depends on:
