Voltage in the secondary coil of a transformer does not depend upon:

1.	frequency of the source
2.	voltage in the primary coil
3.	ratio of the number of turns in the two coils
4.	both (2) and (3)

In Carnot, engine efficiency is \(40\text{%}\), at hot reservoir temperature \(T\). For \(50\text{%}\) efficiency, what will be the temperature of the hot reservoir?
1. \(\frac TS\)
2. \(\frac{2T}{5}\)
3. \(6T\)
4. \(\frac{6T}{5}\)

A ball of mass \(2\) kg moving with velocity \(3\) m/s, collides with spring of natural length \(2\) m and force constant \(144\) N/m. What will be the length of the compressed spring?
1. \(2\) m
2. \(1.5\) m
3. \(1\) m
4. \(0.5\) m

A proton moving vertically downward enters a magnetic field pointing towards the north. In which direction the proton will deflect?
1. east
2. west
3. north
4. south

Induced emf in the coil depends upon:

X-rays are used in determining the molecular structure of crystalline because:

Light of frequency \(v\) falls on the material of threshold frequency \(v_0.\) Maximum kinetic energy of the emitted electron is proportional to:
1. \(v-v_0\)
2. \(v\)
3. \(\sqrt{v-v_0}\)
4. \(v_0\)

A light moves from denser to rarer medium, which of the following is correct?

Which one of the following statements is true?

A metro train starts from rest and in \(5\) s achieves \(108\) km/h. After that it moves with a constant velocity and comes to rest after travelling \(45\) m with uniform retardation. If total distance travelled is \(395\) m, then total time of travelling is:
1. \(12.2\) s
2. \(15.3\) s
3. \(9\) s
4. \(17.2\) s