Physical Science Quiz

Why do we consider tungsten as a suitable material for making the filament of a bulb?

• High resistivity value and low melting point

• Low resistivity value and high melting point

• Low resistivity value and low melting point

• High resistivity value and high melting point

What type of magnetic pole is formed at the face that has flow of current as shown in figure?

• Positive pole

• Negative pole

• South pole

• North pole

Rajkumar said to you that the magnetic field lines are open and they start at north pole of bar magnet and end at south pole. What questions do you ask Rajkumar to correct him by saying 'field lines are closed'?

• What is the direction of field lines inside the bar magnet?

• What is the direction of field lines outside the bar magnet?

• Are these field lines are closed or open?

• What is the nature of field line?

What is thermite process? Mention its applications in daily life?

• The reaction of metal oxides with Aluminium produces molten metal. Applications in daily life: i) To join cracked machine parts ii) To join railings of railway track

• The reaction of metal oxides with Zinc produces molten metal. Applications in daily life: i) To join cracked machine parts ii) To join railings of railway track

• The reaction of metal oxides with Copper produces molten metal. Applications in daily life: i) To join cracked machine parts ii) To join railings of railway track

• The reaction of metal oxides with Iron produces molten metal. Applications in daily life: i) To join cracked machine parts ii) To join railings of railway track

State Ohm's law. Suggest an experiment to verify it and explain the procedure.

• The potential difference between the ends of a conductor is inversely proportional to the electric current passing through it at varying temperature. Aim: To show that the ratio V/I is a constant for a conductor. Materials required: 6V battery eliminator, 0 to 1A ammeter, 0-6V volt meter, copper wires,50cm manganin coil, Rheostat, switch

• The potential difference between the ends of a conductor is directly proportional to the electric current passing through it at varying temperature. Aim: To show that the ratio V/I is a constant for a conductor. Materials required: 6V battery eliminator, 0 to 1A ammeter, 0-6V volt meter, copper wires,50cm manganin coil, Rheostat, switch

• The potential difference between the ends of a conductor is inversely proportional to the electric current passing through it at constant temperature. Aim: To show that the ratio V/I is a constant for a conductor. Materials required: 6V battery eliminator, 0 to 1A ammeter, 0-6V volt meter, copper wires,50cm manganin coil, Rheostat, switch

• The potential difference between the ends of a conductor is directly proportional to the electric current passing through it at constant temperature. Aim: To show that the ratio V/I is a constant for a conductor. Materials required: 6V battery eliminator, 0 to 1A ammeter, 0-6V volt meter, copper wires,50cm manganin coil, Rheostat, switch

You can get the atomic mass of an element by

• adding protons and electrons together

• subtracting protons from neutrons

• adding protons and neutrons together

• adding electrons and neutrons together

How many protons are in an atom of Gallium (Ga)?

• 31

• 70

• 49

• 34

How many protons are in an atom of Gallium (Ga)?

• 31

• 70

• 49

• 34

How many protons are in an atom of Gallium (Ga)?

• 31

• 70

• 49

• 34