Free Printable Current Electricity-1

1.

The current in which negative charges start from negative terminal and ends in the positive terminal is known as

a)

Conventional Current

b)

Electronic Current

c)

Ionic Current

d)

All the above

2.

Which of the following is the correct option?

a)

$W=\frac{V}{Q}$

b)

$W=VQ$

c)

$V\ =\ I^2R$

d)

$V\ =\ I^2Rt$

3.

A charge of 1C passes through a wire in 10 seconds. The current is

a)

10A

b)

1A

c)

0.1A

d)

None of above

4.

In the following question more than one answer can be correct. You've to select every correct option to get marks.

a)

When a charge is taken from one point to another point inside a conductor, the work done per unit charge is called potential difference.

b)

In parallel combination of resistances the resultant resistance is higher than the highest resistance.

c)

Positive charges flow from a region of higher potential to lower potential.

d)

All above are correct.

5.

Which of the following are the factors on which resistance depends? (There can be more than one correct options)

a)

$R\propto l$

b)

$R\propto\frac{1}{A}$

c)

$R\propto\frac{1}{\rho}$

d)

All the above

6.

Which of the following statement is correct for defining Ohm's law?

a)

If the physical conditions are kept constant the potential difference across a conductor is proportional to its resistance.

b)

If the physical conditions are kept constant the potential difference across a conductor is proportional to the current.

c)

The potential difference across a conductor is proportional to its resistance.

d)

The potential difference across a conductor is proportional to the current.

7.

Which of the following is the correct expression for unit of resistivity?

a)

$\Omega cm$

b)

$\Omega m^{-1}$

c)

$\Omega m$

d)

$\Omega cm^{-1}$

8.

Two wires of same length and material have their radii

r_1

and

r_2

. Which of the following is correct?

a)

$\frac{R_1}{R_2}\propto\frac{r_1}{r_2}$

b)

$\frac{R_1}{R_2}\propto\frac{r_2}{r_1}$

c)

$\frac{R_1}{R_2}\propto\frac{r_1^2}{r_2^2}$

d)

$\frac{R_1}{R_2}\propto\frac{r_2^2}{r_1^2}$

9.

A wire of resistance $2\Omega$ is stretched to thrice its original length. What is its new resistance?

a)

$6\Omega$

b)

$9\Omega$

c)

$12\ \Omega$

d)

$18\Omega$

10.

A students has to derive the equation for equivalent resistance for parallel combination. He did the derivation as given. You have to tell if any step is wrong or not, and if any step is wrong then which one or which steps? (There can be more than one correct answer)

a)

Step 1 is wrong.

b)

Step 2 is wrong.

c)

Step 3 is wrong.

d)

All steps are wrong.

Current Electricity-1

Total questions: 10

Worksheet time: 25mins

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