Kumar Mittal Solutions for Exercise 1: QUESTIONS

Author:Kumar Mittal

Kumar Mittal Physics Solutions for Exercise - Kumar Mittal Solutions for Exercise 1: QUESTIONS

Attempt the practice questions from Exercise 1: QUESTIONS with hints and solutions to strengthen your understanding. NOOTAN ISC PHYSICS Class 12 Part-1 solutions are prepared by Experienced Embibe Experts.

Questions from Kumar Mittal Solutions for Exercise 1: QUESTIONS with Hints & Solutions

EASY
12th ICSE
IMPORTANT

An electric motor of 1 HP (horse-power) is running at 220 V What is the current in the motor? 

MEDIUM
12th ICSE
IMPORTANT

Calculate the equivalent resistance between points A and B in each of the following networks of resistors.

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EASY
12th ICSE
IMPORTANT

Calculate the equivalent resistance between points A and B in each of the following networks of resistors.

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HARD
12th ICSE
IMPORTANT

A wire whose resistance 0.1 Ω/cm, is bent in the form of a square ABCD of side 10 cm.  An exactly similar wire is connected across the points B and D. What will be the equivalent resistance between the other two corners A and C of the square? If a 2V battery be connected between A and C, then what will be the current drawn from the battery? If an ammeter be connected across B and D. what will it read?

HARD
12th ICSE
IMPORTANT

The resistance of a silver wire at 0°C is 1.25 Ω . Up to what temperature it must be heated so that its resistance is doubled? The temperature coefficient of resistance of silver is 0.00375°C-1. Will the temperature be the same for all conductors of silver?

HARD
12th ICSE
IMPORTANT

The resistance of the coil used in a platinum-resistance thermometer at 0°C is 3.00 Ω and at 100°C is 3.75 Ω. Its resistance at an unknown temperature is measured 3.15 Ω. Calculate the unknown temperature.

MEDIUM
12th ICSE
IMPORTANT

The resistance of a carbon filament at 0°C is 104 Ω. What should be the resistance of an iron filament which should be connected in series with the carbon filament so that the resistance of the combined filament does not change with temperature? The temperature coefficient of resistance of iron is α =+ 0.0052°C-1 and of carbon is -0.0003°C-1.

MEDIUM
12th ICSE
IMPORTANT

A metallic wire has a resistance of 3.0 Ω at 0°C and 4.8 Ω at  1500 C. Find the temperature coefficient of resistance of its material.