SSC (Marathi Semi-English) इयत्ता १० वी - Maharashtra State Board Important Questions for Science and Technology 1

The unit of electrical power is _______.

The right-hand thumb rule is also called _______ rule.

Which of the following scientist invented the rule of electromagnetic induction?

Alternating current : oscillatory :: Direct current : _______

Write two devices based on the heating effect of electric current.

Match the columns.

Explain the importance/uses of fuse wire.

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

Observe the given figure of Fleming's Left Hand Rule and write the labels of 'A' and 'B':

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?

Answer the following questions based on the given graph.

1. Identify which curve shows AC and DC.
2. What is the frequency of AC and DC?

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?

Observe the following diagram and answer the questions.

1. Construction of which equipment does the above diagram show?
2. On which principle does this equipment work?
3. According to which law the coil ABCD rotates?
4. Write the law in your own words.
5. Where is this equipment used?

Find the odd one out.

Complete the correlation:

DC : Non-oscillatory current flowing in one direction : : AC : ______

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

Observe the given figure of a current-carrying solenoid and write the labels of A and B correctly.

The figure given below shows the magnetic field around the conductor. Study it and answer the questions:

1. What changes are caused by increasing current?
2. What do you see when the magnetic needle is kept a little away from the wire?
3. In the second part of the figure, the iron filings arrange themselves in a circular manner around the wire. Why does this happen?

Identify the figure and give its use.

Draw a neat diagram of a solenoid and name its various components.