1
JEE Main 2024 (Online) 29th January Evening Shift
+4
-1

In the given circuit, the current in resistance R$$_3$$ is :

A
2 A
B
1.5 A
C
1 A
D
2.5 A
2
JEE Main 2024 (Online) 29th January Morning Shift
+4
-1

The deflection in moving coil galvanometer falls from 25 divisions to 5 division when a shunt of $$24 \Omega$$ is applied. The resistance of galvanometer coil will be :

A
$$48 \Omega$$
B
$$100 \Omega$$
C
$$96 \Omega$$
D
$$12 \Omega$$
3
JEE Main 2024 (Online) 29th January Morning Shift
+4
-1

A galvanometer having coil resistance $$10 \Omega$$ shows a full scale deflection for a current of $$3 \mathrm{~mA}$$. For it to measure a current of $$8 \mathrm{~A}$$, the value of the shunt should be:

A
$$3.75 \times 10^{-3} \Omega$$
B
$$3 \times 10^{-3} \Omega$$
C
$$4.85 \times 10^{-3} \Omega$$
D
$$2.75 \times 10^{-3} \Omega$$
4
JEE Main 2024 (Online) 29th January Morning Shift
+4
-1

The electric current through a wire varies with time as $$I=I_0+\beta t$$, where $$I_0=20 \mathrm{~A}$$ and $$\beta=3 \mathrm{~A} / \mathrm{s}$$. The amount of electric charge crossed through a section of the wire in $$20 \mathrm{~s}$$ is :

A
80 C
B
800 C
C
1000 C
D
1600 C
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