CBSE 12th Physics (Term 1) Paper 2021-22

MCQ (Single Correct Answer)

+0.77

-0

Two wires carrying currents I₁ and I₂ lie, one slightly above the other, in a horizontal plane as shown in figure. The region of vertically upward strongest magnetic field is

CBSE 12th Physics (Term 1) Paper 2021-22 Physics - Magnetic Effect of Current Question 20 English

III

CBSE 12th Physics (Term 1) Paper 2021-22

MCQ (Single Correct Answer)

+0.77

-0

Two parallel conductors carrying current of 4.0 A and 10.0 A are placed 2.5 cm apart in vacuum. The force per unit length between them is -

6.4 $$\times$$ 10^$$-$$5 N/m

6.4 $$\times$$ 10^$$-$$2 N/m

4.6 $$\times$$ 10^$$-$$4 N/m

3.2 $$\times$$ 10^$$-$$4 N/m

CBSE 12th Physics (Term 1) Paper 2021-22

MCQ (Single Correct Answer)

+0.77

-0

The magnetic field at the centre of a current carrying circular loop of radius R is B₁. The magnetic field at a point on its axis at a distance R from the centre of the loop is B₂. Then the ratio (B₁ / B₂) is

$$2\sqrt 2 $$

$${1 \over {\sqrt 2 }}$$

$$\sqrt 2 $$

$$2$$

CBSE 12th Physics (Term 1) Paper 2021-22

MCQ (Single Correct Answer)

+0.77

-0

A current carrying wire kept in a uniform magnetic field, will experience a maximum force when it is

perpendicular to the magnetic field

parallel to the magnetic field

at an angle of 45$$^\circ$$ to the magnetic field