If the kinetic energy of a free particle is much greater than its rest energy then its kinetic energy is proportional to:

• A) The reciprocal of the magnitude of its momentum
• B) The square root of the magnitude of its momentum
• C) The magnitude of its momentum
• D) The square of the magnitude of its momentum

An electron is moving at 0.6c.If we calculate its kinetic energy using (1/2) mv2, we get a result that is:

• A) Just half enough
• B) Twice the correct value
• C) About 28% too low
• D) Just right

In special relativity, if the invariant interval is zero, it implies:

• A) The events are lightlike separated
• B) The events are causally disconnected
• C) The events are spacelike separated
• D) The events are timelike separated

The formula \({Q\over t} =kA {ΔT \over L}\) allows us to determine:

• A) Amount of heat transferred over time.
• B) Heat capacity of the material.
• C) Thermal resistance of the material.
• D) Change in temperature due to heat transfer.

In special relativity, what is the term for the minimum energy an object possesses at rest?

• A) Potential energy
• B) Total energy
• C) Rest mass energy
• D) Kinetic energy

In special relativity, the formula for the invariant interval I is given by:

• A) I = {\left( {c\Delta t} \right)^2} + {\left( {\Delta x} \right)^2}
• B) I = {\left( {c\Delta t} \right)^2} - {\left( {\Delta x} \right)^2}
• C) I = {\left( {c\Delta t} \right)^2}
• D) I = \sqrt {{{\left( {c\Delta t} \right)}^2} - {{\left( {\Delta x} \right)}^2}}

In special relativity, the formula for the invariant interval $I$ is given by:

• A) \[I = {\left( {c\Delta t} \right)^2} - {\left( {\Delta x} \right)^2}\]
• B) \[I = {\left( {c\Delta t} \right)^2}\]
• C) \[I = \sqrt {{{\left( {c\Delta t} \right)}^2} - {{\left( {\Delta x} \right)}^2}} \]
• D) \[I = {\left( {c\Delta t} \right)^2} + {\left( {\Delta x} \right)^2}\]

According to relativity theory a particle of mass m with a momentum of 2mc has a speed of:

• A) c/2
• B) 2c
• C) c
• D) 0.89c

What happens to the observed frequency, when an observer approaches a source of light at relativistic speed?

• A) It remains constant
• B) It becomes zero
• C) It decreases
• D) It increases

In special relativity, if the invariant interval is positive, it implies:

• A) The events are simultaneous
• B) The events are timelike separated
• C) The events are lightlike separated
• D) The events are spacelike separated

An electron (m = 9.11×10-31kg, q =1.60×10-19C) travels around a1.7-mm radius circular orbit perpendicular to a 2.8-T magnetic field. Its speed is:

• A) c
• B) 0.16c
• C) 0.94c
• D) 0.36c

Which is the term used to describe the relativistic Doppler effect when the source is moving away from the observer?

• A) Blue shift
• B) Violet shift
• C) Red shift
• D) Green shift

In special relativity, if the invariant interval is negative, it implies:

• A) The events are timelike separated
• B) The events are lightlike separated
• C) The events are spacelike separated
• D) The events are causally disconnected

The relativistic Doppler effect is primarily concerned with?

• A) Sound waves
• B) Wave produced on rope
• C) Water waves
• D) Light waves

What is the correct expression for relativistic momentum $\vec p$ ?

• A) \[\vec p = \frac{{m\vec u}}{\gamma }\]
• B) \[\vec p = m\vec u\]
• C) \[\vec p = \sqrt {\gamma m\vec u} \]
• D) \[\vec p = \gamma m\vec u\]

In relativistic mechanics, the rest energy $E_0$ is equal to:

• A) \[{E_0} = \sqrt {{m_0}{c^2}} \]
• B) \[{E_0} = \sqrt {\gamma {m_0}{c^2}} \]
• C) \[{E_0} = {m_0}{c^2}\]
• D) \[{E_0} = \frac{1}{2}{m_0}{u^2}\]

The formula {Q\over t} =kA {ΔT \over L} allows us to determine:

• A) Amount of heat transferred over time.
• B) Change in temperature due to heat transfer.
• C) Thermal resistance of the material.
• D) Heat capacity of the material.

A diode will be farward biased when

• A) anode is connected to +ve and cathode to -ve terminal of a battery
• B) anode is connected to -ve and cathode to +ve terminal of a battery
• C) Both anode and cathode are connected to +ve terminal
• D) Both anode and cathode are connected to -ve terminal

There is no voltage drop across diode when farward biased, in case of

• A) practical diode model
• B) ideal diode model
• C)
• D)

Leakage current of semiconductor diode is caused by

• A) barrier voltage
• B) chemical energy
• C) heat energy
• D) doping impurity