Quizr: Physics Quiz#2, MCQs

Physics Quiz#2, MCQs

NOTE: Attempt all Questions to see the Result at the bottom of this page.

The Timer has started 10:00

1)

Fahrenheit and Kelvin scales agree numerically at a reading of:
- A) -40
- B) 0
- C) 273
- D) 574
Right Answer is the option "A"

2)

According to the theory of relativity:
- A) energy is not conserved in high speed collision
- B) the speed of light must be measured relative to the ether
- C) moving clocks run fast
- D) none of the above are true
Right Answer is the option "C"

3)

Light from a stationary spaceship is observed, and then the spaceship moves directly away from the observer at high speed while still emitting the light. As a result, the light seen by the observer has:
- A) higher frequency and a longer wavelength than before
- B) lower frequency and a shorter wavelength than before
- C) higher frequency and a shorter wavelength than before
- D) lower frequency and a longer wavelength than before
Right Answer is the option "B"

4)

How fast should you move away from a 6.0 × 10^14 Hz light source to observe waves with a frequency of 4.0 × 10^14 Hz?
- A) 20c
- B) 38c
- C) 45c
- D) 51c
Right Answer is the option "B"

5)

The quantum number n is most closely associated with what property of the electron in a hydrogen atom?
- A) Energy
- B) Orbital angular momentum
- C) Spin angular momentum
- D) Magnetic moment
Right Answer is the option "A"

6)

As the wavelength of a wave in a uniform medium increases, its speed will _____.
- A) Decrease
- B) Increase
- C) remain the same
- D) None of these
Right Answer is the option "C"

7)

If the potential difference across a resistor is doubled:
- A) only the current is doubled
- B) only the current is halved
- C) only the resistance is doubled
- D) only the resistance is halved
Right Answer is the option "A"

8)

By using only two resistors, R1 and R2, a student is able to obtain resistances of 3 Ω, 4Ω, 12Ω, and 16 Ω. The values of R1 and R2 (in ohms) are:
- A) 3, 4
- B) 2, 12
- C) 3, 16
- D) 4, 12
Right Answer is the option "D"

9)

Faraday's law states that an induced emf is proportional to:
- A) the rate of change of the electric field
- B) the rate of change of the magnetic flux
- C) the rate of change of the electric flux
- D) the rate of change of the magnetic field
Right Answer is the option "B"

10)

A generator supplies 100V to the primary coil of a transformer. The primary has 50 turns and the secondary has 500 turns. The secondary voltage is:
- A) 1000V
- B) 500V
- C) 250V
- D) 100V
Right Answer is the option "A"