Consider the following image.A proton enters a magnetic field at right angles to it, as shown above. The direction of force acting on the proton will be

A circular arc QTS is kept in an external magnetic field $${\overrightarrow {\bf{B}} _0}$$ as shown in figure. The arc carries a current $$l$$. The magnetic field is directed normal and into the page. The force acting on the arc is
Electromagnetic Theory mcq question image

Electromagnetic Theory mcq question image

A

$$2l{B_0}R{\bf{\hat k}}$$

B

$$l{B_0}R{\bf{\hat k}}$$

C

$$ - 2l{B_0}R{\bf{\hat k}}$$

D

$$ - l{B_0}R{\bf{\hat k}}$$

March List I with List II : List I List II (A) Supplementary angles (I) Angles less than 90° (B) Complementary angles (II) Two angles whose sum is 180° (C) Acute angles (III) Angles greater than 90° but less than 180° (D) Obtuse angles (IV) Two angles whose sum is 90° Choose the correct answer from the options given below :

A

(A) - (III), (B) - (II), (C) - (I), (D) - (IV)

B

(A) - (IV), (B) - (II), (C) - (III), (D) - (I)

C

(A) - (II), (B) - (IV), (C) - (I), (D) - (III)

D

(A) - (II), (B) - (IV), (C) - (III), (D) - (I)

In the circuit given below, what is the current flowing in 6Ω resistances?
Electricity and Magnetism mcq question image

A

0.22

B

0.55 A

C

2.22 A

D

2.775 A

The symbol represents.
Electricity and Magnetism mcq question image

A

unconnected wire crossing

B

a voltmeter

C

variable resistance or current controller

D

a resistance of resistance R

Use of signal in an electrical circuit. It is indicated by . . . . . . . .?

A

Rheostat

B

Resistor

C

Wire joint

D

Electric cell

What do the given symbol in figure represents in a reference of electric circuit?
Electricity and Magnetism mcq question image

A

resistance

B

plug key

C

electric bulb

D

battery

The given symbol stands for a/an . . . . . . . . in an electric circuit.
Electricity and Magnetism mcq question image

A

plug key

B

electric bulb

C

battery

D

resistor

The flow of . . . . . . . . is anti-clockwise in the given circuit.
Electricity and Magnetism mcq question image

A

resistance

B

voltage

C

electrons

D

current

What does the diagram shows?
Electricity and Magnetism mcq question image

A

Random motion of electrons in closed circuit

B

Random motion of protons in open circuit

C

Random motion of atoms in open circuit

D

Random motion of electrons in open circuit

In a circuit diagram, Electricity and Magnetism mcq question image

The given symbol is used as follows:

A

A wire joint

B

A battery B

C

An electric bulb

D

A resistor of resistance R

Consider the following image.

A proton enters a magnetic field at right angles to it, as shown above. The direction of force acting on the proton will be

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