1
JEE Main 2024 (Online) 30th January Morning Shift
+4
-1

An electric toaster has resistance of $$60 \Omega$$ at room temperature $$\left(27^{\circ} \mathrm{C}\right)$$. The toaster is connected to a $$220 \mathrm{~V}$$ supply. If the current flowing through it reaches $$2.75 \mathrm{~A}$$, the temperature attained by toaster is around : ( if $$\alpha=2 \times 10^{-4}$$/$$^\circ \mathrm{C}$$)

A
1235 $$^\circ$$C
B
1667 $$^\circ$$C
C
694 $$^\circ$$C
D
1694 $$^\circ$$C
2
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
3
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
$$12 \Omega$$
4
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
$$2.75 \times 10^{-3} \Omega$$
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