The deflection in galvanometer falls to $\left(\frac{1}{4}\right)^{\operatorname{th}}$ when it is shunted by 3 Ω . If additional shunt of 2 Ω is connected to earlier shunt, the deflection in galvanometer falls to

$\left(\frac{1}{8.5}\right)^{\operatorname{th}}$

$\left(\frac{1}{3}\right)^{\text {rd }}$

$\left(\frac{1}{4}\right)^{\text {th }}$

The number of turns in a coil of Galvanometer is tripled, then

Voltage sensitivity remains constant and current sensitivity increases 3 times

Both voltage and current sensitivity remains constant

Voltage sensitivity increases 3 times and current sensitivity remains constant

Both voltage and current sensitivity decreases by 33 %

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A particle carrying a charge to $100$ times the charge on an electron is rotating per second in a circular path of radius $0.8 m$ . The value of the magnetic field produced at the centre will be $(μ_{0} =$ permeability for vacuum $)$

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Important Questions on Magnetic Effect of Electric Current

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Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 61

The radii of two concentric coils having same number of turns are

10 cm

and

20 cm

, respectively. Equal currents are passed through them first in same direction and then in opposite direction. In these two conditions, Find the ratio of resultant magnetic fields at the centre?

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Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 62

Calculate the magnetic field at the centre of a coil in the form of a square of side

2 a

carrying a current

I

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Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 63

A small current element of length

d l

and carrying current

i

is placed at

(1, 1, 0)

and is carrying current in

+ z

direction. If the magnetic field at origin be

{\vec{B}}_{1}

and at point

(2, 2, 0)

{\vec{B}}_{2}

then

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Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 64

Two very long, straight, parallel wires carry steady currents

I

and

- I

, respectively. The distance between the wires is

d

. At a certain instant of time, a point charge

q

is at a point equidistant from the two wires, in the plane of the wires. Its instantaneous velocity

v

is perpendicular to this plane. Its instantaneous magnitude of the force due to the magnetic field acting on the charge at this instant is

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Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 65

If a current $I$ is flowing in a loop of radius $r$ , as shown in adjoining figure, then the magnetic field induction at the centre $O$ will be

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Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 66

A circular current carrying coil has a radius

R

. The distance from the centre of the coil on the axis, where the magnetic induction will be

{\frac{1}{8}}^{th}

to its value at the centre of the coil is

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Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 67

Charge

q

is uniformly spread on a thin ring of radius

R

. The ring rotates about its axis with a uniform frequency

f Hz

. The magnitude of magnetic induction at the centre of the ring is

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Physics Crash Course MHT-CET>Chapter 16 - Magnetic Effect of Electric Current>Exercise 1>Q 68

The phenomenon in which magnetic field is produced in the space near a conductor carrying current is called,

A particle carrying a charge to 100 times the charge on an electron is rotating per second in a circular path of radius 0.8 m. The value of the magnetic field produced at the centre will be μ0=permeability for vacuum)

Important Questions on Magnetic Effect of Electric Current

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A particle carrying a charge to $100$ times the charge on an electron is rotating per second in a circular path of radius $0.8 m$ . The value of the magnetic field produced at the centre will be $(μ_{0} =$ permeability for vacuum $)$