AS Multiple Choice Selection 2
Q1.
The frequency of a body moving with simple harmonic motion is doubled. If the amplitude remains the same which of the following is also doubled?
 
A	The time period.		
B	The total energy.		
C	The maximum velocity.		
D	The maximum acceleration.		
(Total 1 mark)
Q2.
A model car moves in a circular path of radius 0.80 m at an angular speed of   rad s–1.
 
What is its displacement from point P 6.0 s after passing P?
A        zero
B        0.4π m
C        1.6 m
D        1.6π m
(Total 1 mark)
Q3.
A fixed mass of gas occupies a volume V. The temperature of the gas increases so that the root mean square velocity of the gas molecules is doubled.
What will the new volume be if the pressure remains constant?
 
A	 	 	
B	 	 	
C	2V	 	
D	4V	 	
(Total 1 mark)

Q4.
A planet has a radius half the Earth’s radius and a mass a quarter of the Earth’s mass. What is the approximate gravitational field strength on the surface of the planet?
 
A	1.6 N kg–1	 	
B	5.0 N kg–1	 	
C	10 N kg–1	 	
D	20 N kg–1	 	
(Total 1 mark)
Q5.
Two parallel metal plates are separated by a distance d and have a potential difference V across them. Which expression gives the magnitude of the electrostatic force acting on a charge Q placed midway between the plates?

A		 	
B		 	
C		 	
D		 	
(Total 1 mark)

Q6.

The potentials at points R and S due to the +5.0 nC charge are 375 V and 450 V respectively.
How much work is done when a +2.0 nC charge is moved from R to S?
 
A	0.12 μJ	
B	0.15 μJ	
C	0.19 μJ	
D	0.38 μJ	
(Total 1 mark)
Q7.
After 64 days the activity of a radioactive nuclide has fallen to one sixteenth of its original value. The half-life of the radioactive nuclide is
 
A	2 days.	 	
B	4 days.	 	
C	8 days.	 	
D	16 days.	 	
(Total 1 mark)
Q8.
Which of the following is equal to  ?
 
A	1.19	 	
B	1.25	 	
C	1.33	 	
D	1.40	 	
(Total 1 mark)
Q9.  A horizontal straight wire of length 0.30 m carries a current of 2.0 A perpendicular to a horizontal uniform magnetic field of flux density 5.0 × 10–2 T. The wire ‘floats’ in equilibrium in the field.
 
What is the mass of the wire?
 
A 	8.0 × 10–4 kg		
B 	3.1 × 10–3 kg		
C	3.0 × 10–2 kg		
D	8.2 × 10–1 kg		
(Total 1 mark)
Q10.  The capacitor in the circuit is initially uncharged. The switch S is closed at time t = 0.
Which pair of graphs, A to D, correctly shows how the pd across the capacitor and the current in the circuit change with time?
 
(Total 1 mark)

Mark schemes
Q1.
C
[1]
Q2.
C
[1]
Q3.
D
[1]
Q4.
C
[1]
Q5.
B
[1]
Q6.
B
[1]
Q7.
D
[1]
Q8.
B
[1]
Q9.
B
[1]
Q10.
A
[1]