SCERT Maharashtra solutions for सायन्स अँड टेक्नॉलॉजी पार्ट १ [इंग्रजी] इयत्ता १० महाराष्ट्र राज्य मंडळ chapter 4 - Effects of electric current [Latest edition]

The unit of electrical power is _______.

The ‘live’ and the ‘neutral’ wires have potential difference of _______.

In an electric bulb, coil of _______ metal is used.

The electricity bill specifies the usage in _______.

The frequency of AC is _______.

These days when current in the circuit suddenly increases _______ switches are used.

A coil of an alloy _______ is used in electric heater cooker as a resistor.

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

_______ is used for electrical measurements.

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

Which of the following substance contracts on heating?

Electric motor : converts electrical energy into mechanical energy : : Electric generator : _______

Fleming's left hand rule : electric current : : Fleming's right hand rule : _______

Alternating current : oscillatory :: Direct current : _______

Tell the odd one out. Give a proper explanation.

Tell the odd one out. Give a proper explanation.

Find the odd one out and give its explanation.

Find the odd one out and give its explanation.

Find the odd one out and give its explanation.

What is the heating effect of electric current?

Which metal is used to make the filament of an electric bulb?

What is a short circuit?

What is the potential difference?

How much is the potential difference between live and neutral wires?

What is used to turn off the sudden increase in current in the electrical circuit of the house nowadays?

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

Write Fleming’s right hand thumb rule with the help of diagram.

Write Fleming’s left hand rule.

What is a solenoid?

Write the two names in the following diagram.

Right hand thumb rule.

Write the two names in the following diagram.

Fleming’s right hand rule.

Match the columns.

Right or wrong sentence.

The alternating current is a vibrating current.

Right or wrong sentence.

Electrical wires and neutral wires have a 220 V potential difference.

Right or wrong sentence.

Increasing the current passing through the wire decreases the magnetic field intensity.

Right or wrong sentence.

Use galvanometers for electrical measurements.

Right or wrong sentence.

The frequency of the alternating current is 50 Hz.

Right or wrong sentence.

Electro chemicals are devices that convert electrical energy into mechanical energy.

Give Scientific reason.

In practice, the unit kWh is used for the measurement of electrical energy, rather than joule.

Give a scientific reason.

Tungsten metal is used to make a solenoid type coil in an electric bulb.

Give a scientific reason:

For electric power transmission, copper or aluminium wire is used.

Nowadays MCBs are used in homes, for stop the current in the circuit which suddenly increases.

Write scientific reason.

A coil made up of alloy Nichrome is used in the electric heater cooker as a resistor.

Write scientific reason.

It is beneficial to carry electrical energy in AC form as it is carried over long distances.

Distinguish between Direct current and alternating current.

What are the effects of a short circuit?

Write Fleming’s left hand rule.

What is an electric motor?

In which electric motor appliances do we use it?

Name any two appliances which works on the phenomenon of magnetic effect of electric current.

Name any two appliances which works on the phenomenon of heating effect of electric current.

Write Fleming’s right hand thumb rule with the help of diagram.

Explain the importance/uses of fuse wire.

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

Name any two appliances which works on the phenomenon of magnetic effect of electric current.

Write Fleming’s left hand rule.

Write Fleming’s right hand thumb rule with the help of diagram.

An electric iron of 1100 W is operated for 2 hrs daily. What will be the electrical consumption expenses for that in the month of April? (The electric company charges Rs 5 per unit of energy).

What is overloading?

When does overloading occur?

What does overloading cause?

How can overloading be avoided?

Explain the construction and working of the following. Draw a neat diagram and label it.

Electric motor

Write a short note on the galvanometer.

What is the use of earthing wire?

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

Draw a neat labelled diagram to show the magnetic effect of electric current.

Name the following diagram and explain the concept behind it.

Name the following diagram and explain the concept behind it.

Identify the given figure, write the labels of it.

Who will spend more electrical energy? 500 W TV Set in 30 mins, or 600 W heater in 20 mins?

Explain the magnetic field created by a current around a conductor from the figure.

Observe the figure and write the answers to the questions asked.

1. The construction shown in the figure is of which device?
2. Explain the principle on which this device works.
3. Write any three uses of this device.

Observe the figure and write the answers to the questions asked.

1. The construction shown in the figure is of which device?
2. Explain the principle on which this device works.
3. Write any three uses of this device.