Home
Class 12
PHYSICS
The area of the coil in a moving coil ga...

The area of the coil in a moving coil galvanometer is `15cm^(2)` and has 20 turns. The magnetic induction is `0.2T` and the couple per unit twist of the suspended wire is `10^(-6) Nm` per degree. If the deflection is `45^(@)`, the current passing through it is

A

`75 xx 10^(-4) A`

B

`7.5 xx 10^(-4) A`

C

`0.75 xx 10^(-4) A`

D

`750 xx 10^(-4) A`

Text Solution

Verified by Experts

The correct Answer is:
A
`tau theta = BAIN`
Promotional Banner

Topper's Solved these Questions

  • MOVING CHARGES AND MAGNETISM

    NARAYNA|Exercise EXERCISE - 1(H.W) (CONVERSION OF MCG INTO AMMETER AND VOLTMETER)|9 Videos

  • MOVING CHARGES AND MAGNETISM

    NARAYNA|Exercise EXERCISE - 2(C.W) (AMPERE.S CIRCUITAL LAW BIO-SAVART LAW AND ITS APPLICATIONS)|19 Videos

  • MOVING CHARGES AND MAGNETISM

    NARAYNA|Exercise EXERCISE - 1(H.W) (TORQUE ON CURRENT LOOP)|3 Videos

  • MAGNETISM AND MATTER

    NARAYNA|Exercise EXERCISE - 4 (SINGLE ANSWER TYPE QUESTION)|17 Videos

  • NUCLEAR PHYSICS

    NARAYNA|Exercise LEVEL-II-(H.W)|9 Videos

Similar Questions

Explore conceptually related problems

The area of the coil in a moving coil galvanometer is 16 cm^2 and has 20 turns. The magnetic induction is 0.2T and the couple per unit twist of the suspended wire is 10^(-6) Nm per degree. If the deflection is 45^@ calculate the current passing through it

A coil of a moving coil galvanometer has 100 turns and effective area of 0.005 m^(2) . It is suspended in a radial magnetic field of induction 0.001 Wb//m^(2) . The torque per unit twist of thr suspension fibre is 5 xx 10^(-9)Nm /degree. What is the currebnt sectivity of the moving coil galvanometer?

The moving coil galvanometer has 60 turns, a width of 2 cm and a length of 3 cm. It hangs in uniform magnetic field of 500 cgs unit. If the controlling couple, due to the twist in the suspension wire is 18 dyne cm, then the current flowing through it is

The coil in a MCG has an area of 4cm^(2) and 500 turns. The intensity of magnetic induction is 2T . When a current of 10^(-4)A is passes through it, the deflection is 20^(@) . The couple per unit twist is (N-m)

The coil of a moving coil galvanometer is suspended in a magnetic field of 100 G. If the torsional constant of the suspension wire is 1.5 xx 10^(-8) Nm/rad, find the current sensitivity of galvanometer. The area of the coil is 0.05 m^(2) .

A moving coil galvanometer has a rectangular coil of area 10^(-3) m^(2) and 150 turns. The torsional constant of the hair springe connected to the coil is 5 xx 10^(-7) Nm per degree. The maximum angular deflection is 30^(@) . Calculate the maximum current that can be measured by it if its rectangular coil is kept in a radial horizontal magnetic field of 2,000 G .

A rectangular coil of a moving coil galvanometer has 50 turns and an area of 12cm^2 . It is suspended in a radial magnetic field of induction 0.025 Wb//m^2 . The torsional constant of the suspension fibre is 1.5 xx10^-9 Nm/degree. The current required to produce the deflection of 5^@ is

A rectangular coil of M.C.G. of 100 turns , each of length 4 cm and breadth 3 cm , is suspended freely in a radial magnetic field of induction 2xx10^-2 N/Am. The torsional constant of the suspension fibre is 2xx10^-8 Nm per radian. The deflection of the coil when a current of 2 mu A is passed through it is nearly .