SSC (Marathi Semi-English) 10th Standard Board Exam [इयत्ता १० वी] - Maharashtra State Board Important Questions for Science and Technology 1

Explain the application of heating effect of electric current in an electric bulb with a diagram.

If 220 V potential difference is applied across an electric bulb, a current of 0.45 A flows in the bulb. What must be the power of the bulb?

Tara, after completing her exams, went to her grandmother's house along with her younger brother Rahul. One day, Rahul came home after playing and switched on the fan and air conditioner. At the same time, his grandmother was preparing a milkshake for him using a mixer. Suddenly, they heard a big sound and the electricity of the house got shut down. Tara is called an electrician. He said the main reason for supply to shut down was overloading.

1. What is overloading?
2. Is overloading and short the same? When does short-circuiting take place?
3. How can the effects of overloading be avoided?

Find the odd one out.

In the electric equipment producing heat like iron, electric heater, boiler, toaster etc., an alloy such as nichrome is used, not pure metals.

Draw figure ‘Electric motor’ and working 

Name any four appliances where electric motor is used.

When does short circuiting take place?

What happens to the resistance of the circuit during a short circuit?

What happens to the flow of electric current during a short circuit?

What is overloading?

How can the effects of overloading be avoided?

Magnetic lines of force are closed continuous curves.

State Fleming’s right-hand rule.

State three differences between direct current and alternating current.

Why should the wires carrying electricity not be touched barefooted?

The device used for producing electric current is called a ______.

State whether the following statement is true or false.

An electric motor converts mechanical energy into electrical energy.

State the right-hand thumb rule.

Explain the construction and working of an electric motor.