### Wrong

#### Score: 0 / 1

The resistors have resistance of 3.0 Ω and 6.0 Ω as shown.

What is the current in resistor X?

0.40 A

0.50 A

1.0 A

2.0 A

### Wrong

#### Score: 0 / 1

(V–I) characteristics shown and are connected in parallel.

What is the resistance of the lamp and the resistance of the diode when the current in each device is 2.0 A?

### Wrong

#### Score: 0 / 1

The Coulomb constant is k. Which of the following is the electrical potential at the centre of the square O?

0

(4kq)/r

(4kqsqrt2)/r

(-4kqsqrt2)/r^2

p/4

P

4P

16P

### Wrong

#### Score: 0 / 1

6 V is the potential difference across the resistor.

6 J of thermal energy is dissipated in the battery.

6 J of chemical energy is transformed in the battery.

6 J of thermal energy is dissipated in the resistor.

### Wrong

#### Score: 0 / 1

What is the electric potential difference between the initial and final position of the ion?

(EQ)/s

EQs

Es

E/s

### Wrong

#### Score: 0 / 1

The current in the battery is 6A.

The potential difference across the load is 12V.

The power dissipated in the battery is 18W.

The resistance in the circuit is 1.0Ω.

### Wrong

#### Score: 0 / 1

The magnetic force on the proton is

from left to right.

from top to bottom.

into the plane of the paper.

zero

### Wrong

#### Score: 0 / 1

This particle could be

an alpha particle.

a beta particle.

a photon.

a neutron.

### Wrong

#### Score: 0 / 1

The magnetic force on the current carrying wire is

zero.

into the plane of the paper.

out of the plane of the paper.

at an angle θ to the direction of the magnetic field.

### Wrong

#### Score: 0 / 1

Plane P is perpendicular to the wire. How many electrons pass through plane P in each second?

e/I

(ve)/I

I/(ve)

I/(e)

### Wrong

#### Score: 0 / 1

Increasing the mass of the ion

Increasing the charge of the ion

Increasing the speed of the ion

Decreasing the magnetic flux density of the field

(Vt)/R

(Rt)/V^2

RV2t

(V^2t)/R

### Wrong

#### Score: 0 / 1

VR at a point R in an electric field and at another point S the electric potential is VS. Which of the following is the work done by the electric field on a point charge +q as it moves from R to S?

VR-VS

q(VR-VS)

VS-VR

q(VS-VR)

### Wrong

#### Score: 0 / 1

vX and in Y it is vY.

What is the value of the ratio (vX)/(vY)?

0.25

0.50

2.00

4.00

### Wrong

#### Score: 0 / 1

What is the radius of a copper wire with length L/2 and resistance R?

2r

sqrt2r

r/sqrt2

r/2

A

B

C

D

### Wrong

#### Score: 0 / 1

R1 and R2, are connected in series with a cell of emf ε and negligible internal resistance.

Which expression gives the potential difference across the resistor of resistance R1?

(R_1/(R_1+R_2))epsi

((R_1+R_2)/R_1)epsi

(R_2/(R_1+R_2))epsi

((R_1+R_2)/R_2)epsi

### Wrong

#### Score: 0 / 1

What is the reading on the voltmeter?

1.0 V

1.7 V

4.0 V

5.0 V

### Wrong

#### Score: 0 / 1

Which of the following electric fields could have caused the charged particle to follow the above path?

A

B

C

D

### Wrong

#### Score: 0 / 1

The ammeter has resistance equal to 1.0Ω and the voltmeter is ideal. What are the readings of the ammeter and the voltmeter?

### Wrong

#### Score: 0 / 1

-7μC and +2μC, are at a fixed distance apart. At which point is it possible for the electric field strength to be zero?

A

B

C

D

### Wrong

#### Score: 0 / 1

An electron enters the field with a velocity v in the direction shown. The electron is moving in the plane of the paper. The path followed by the electron will be

parabolic.

in the direction of E.

in the direction of v.

circular.

### Wrong

#### Score: 0 / 1

What is the direction of the electron flow in P and the direction of the electron flow in Q?