Download App

Electric Current and its Effects — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7ScienceElectric Current and its Effects1 Mark
MCQ
The essential requirements for a good heating element are _________________.
  • A
    High resistivity and low melting point.
  • ✓
    High resistivity and high melting point.
  • C
    Low resistivity and low melting point.
  • D
    Low resistivity and high melting point.
✓

Answer

Correct option: B.
High resistivity and high melting point.

 $\text{ESSENTIAL REQUIREMENTS OF GOOD HEATING ELEMENT}$ High-specific resistance so that small length of wire may be required to provide given amount of heat.
High - melting point so that it can withstand for high temperature, a small increase in temperature will not destroy the element.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "MCQ (1 Marks)" from Electric Current and its Effects→Electric Current and its Effects — all question types→Science STD 7 question papers→Gujarat Board STD 7 question papers→Gujarat Board question paper generator→

Similar questions

Which of the following turns blue litmus red?
→
$.......$ is a saprophyte?
→
How long does Earth take to complete one revolution?
→
Which of the following is not a function of the crowns of forest trees during the daytime?
→
Fish uses which organ to breath in water?
→
Which of the following type of soil will form a colloidal solution when suspended in water?
→
If a piece of soft iron is placed inside the coil n number of turns and current is passed in the coil from a battery, what name is then given to the device so obtained?
→
The direction of airflow is also affected by Earth's rotation. It is called $........$
→
What is the state of the blood?
→
Which of the following is a chemical change?
→