1
MHT CET 2021 20th September Evening Shift
+1
-0

A galvanometer has resistance '$$\mathrm{G}$$' $$\Omega$$ and '$$\mathrm{I}_{\mathrm{g}}$$' is current flowing through it which produces full scale deflection. '$$\mathrm{S}_1$$' is the value of shunt which converts it into an ammeter of range 0 to '$$3 \mathrm{I}$$' and '$$\mathrm{S}_2$$' is the shunt value which converts it into an ammeter of range 0 to '$$4 \mathrm{I}$$', the ratio $$\mathrm{S}_2: \mathrm{S}_1$$ is

A
$$\frac{4}{3}$$
B
$$\frac{3 \mathrm{I}-\mathrm{I}_{\mathrm{g}}}{4 \mathrm{I}-\mathrm{I}_{\mathrm{g}}}$$
C
$$\frac{3}{4}$$
D
$$\frac{4 I-I_g}{3 I-I_g}$$
2
MHT CET 2021 20th September Evening Shift
+1
-0

In potentiometer experiment, null point is obtained at a particular point for a cell on potentiometer wire '$$\mathrm{x}$$' cm long. If length of potentiometer wire is increased by few centimeter without changing the cell, the balancing length will [Driving source is not changed]

A
will net change.
B
increase
C
decrease
D
become zero
3
MHT CET 2021 20th September Morning Shift
+1
-0

A galvanometer of resistance $$50 \Omega$$ is converted to an ammeter. After shunting, the effective resistance of ammeter is $$2.5 \Omega$$. The value of shunt is

A
$$\frac{100}{19} \Omega$$
B
$$\frac{50}{19} \Omega$$
C
$$\frac{25}{19} \Omega$$
D
$$\frac{75}{19} \Omega$$
4
MHT CET 2021 20th September Morning Shift
+1
-0

Consider the circuit shown in the figure. The value of current 'I' is A
$$-\frac{7}{18}$$A
B
5A
C
3A
D
$$-3$$A
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