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

Statement 1 : Electric current ( flow of electrons ) creates heat in the resistor.
Statement 2 : Heat in the resistor is created according to the rule of energy conservation.
Explain Statement 1 with the help of Statement 2.

Find the odd one out and justify it.
Fuse wire, M.C.B., Rubber Gloves, Generator

Why does tungsten metal used to make solenoid type coil in an electric bulb?

Observe the following figure which bulb get fuse?

Two tungsten bulbs of power 50 W and 60 W work on 220 V potential difference. If they are connected in parallel, how much current will flow in the main conductor?

Give scientific reason :
In the electric equipment producing heat e.g. iron, electric heater, boiler, toaster, etc., an alloy such as Nichrome is used, not pure metals.

To increase the effective resistance in a circuit, the resistors are connected in _______________ .

Match the column ‘A’ with column ‘B’.

Choose the correct alternative and rewrite the following sentence.

If three resistors 2 ohms, 3 ohms and 4 ohms are connected in series, then the effective resistance in the circuit will be _______ ohms.

Choose the correct alternative and rewrite the following:

You are given three equal resistances. In how many combinations can they are arranged?

The equivalent resistance of a parallel combination of two resistors of 30 Ω and 60 Ω is ______________.

An electric iron rated 750 W is operated for 2 hours/day. How much energy is consumed by the electric iron for 30 days?

When do you say that the resistors are connected in this way? Draw a circuit diagram.

Name any six domestic appliances based on the heating effect of electric current.

Rewrite the following statement by selecting the correct option.

The S.I. unit of resistance is __________.

Rewrite the following statement by selecting the correct option:

1 A = ____________ mA.

Answer the following question:
what is the heating effect of the electric current? state any four applications of it?

The unit of electrical power is _______.

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

Explain the importance/uses of fuse wire.