10th Class Physics Chapter 7 TestELECTRICITY

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. The current was considered to be due to flow of only positive charges, named as:

   1. Conventonal current

   2. Diretc current

   3. Indirect current

   4. Alternating current

2. A typical main circuit consist of wires:

   1. Two

   2. Three

   3. Four

   4. Five

3. What does electricity power to charge phones, laptops, and electric vehicles?

   1. Electronics

   2. Chargers

   3. Motors

   4. Bulbs

4. Which are the hazards of electricity?

   1. Malpractice

   2. Damage insulation

   3. Over heating

   4. All of these

5. A potential divider is a circuit that divides voltage into parts:

   1. Bigger

   2. Smaller

   3. Moderate

   4. Nano

6. What type of electric current flows in one direction only?

   1. Alternating current

   2. Direct current

   3. Induced current

   4. None of these

7. The unit of R (resistance of a conductor) is:

   1. Ohm

   2. Newton

   3. Ampere

   4. Volt

8. The electric curreny can be caused due to the movement of:

   1. Positive charges

   2. Negative charges

   3. Both a and b

   4. None of these

9. What happens when too many devices are plugged into a single socket or extension lead?

   1. Voltage increases

   2. Overloading occurs

   3. Insulation improves

   4. Resistance becomes zero

10. According to Ohm's law, current is directly proportional to potential difference provided that which of the following remains same?

    1. Resistance

    2. Chemical composition

    3. Physical state (temperature, dimension)

    4. Magnetic field